Benxidine_Kain Industrial Additives

Benxidine
[Overview] The chemical name of Fenpropidine is (RS) 1-[3-(4-tert-butylphenyl)-2-methylpropyl]-piperidine, which is a drug developed by Syngenta. The new piperidine systemic fungicide, whose mechanism of action is to inhibit sterol synthesis, is particularly effective against powdery mildew, especially powdery mildew, ryesporium and rust fungus. At present, fenpropidin has been promoted and used on crops such as wheat, barley, grapes and bananas, and its application scope is being further expanded. In order to ensure its safe use, many countries have stipulated the maximum residue limit (MRL) standards for fenpropidine in different fruits.
【Physical and chemical properties】
Appearance and properties: brown transparent liquid
Density: 0.924 g/cm3
Boiling point: 368.9ºC at 760 mmHg
Flash point: 159.3ºC
Refractive index: 1.507
【Safety Information】
Packaging grade: III
Hazard Category: 6.1(b)
Dangerous goods transport code: UN 2902
Hazard category code: R21/22; R36
Safety Instructions: S26-S36/37
Dangerous goods mark: Xn
【Main purpose】[2]
It is a sterol decomposition inhibitor and is particularly effective against powdery mildew, especially powdery mildew, ryesporium and rust fungus.
【Toxicity】
Rat acute oral LD50 is 1.45g/kg, mouse acute oral LD50>3.2g/kg, rat acute transdermal LD50>4000mg/kg, rat intraperitoneal injection LD50 is 350mg/kg, rat acute inhalation LC501. 22mg/L air. It is not allergic to guinea pig skin, has irritating effects on rabbit eyes and guinea pig skin, has no teratogenic or mutagenic effects, and has no effect on reproduction. No-effect dose in feeding test: rats (2 years) 0.5mg/(kg •d), mice (1.5 years) 4.5mg/(kg •d), dogs (1 year) 2mg/(kg •d), The ADI for humans is 0.005 mg/kg body weight. The acute oral LD50 of female mallards is 1.9g/kg, and the acute oral LD50 of pheasants is 370mg/kg. Fish poison LC50 (96 hours): rainbow trout 2.6 mg/L, carp 3.6 mg/L, blue gill 1.9 mg/L. Relatively non-toxic to bees, LD50 (48 hours) (oral) >0.01mg/bee; (contact) 0.046mg/bee. Earthworm LC50 (48 days)>1000μg/kg soil. Daphnia LC50 (48 hours) 0.5mg/L.
【How to use】
When applying this product, follow the recommended dosage and spray the watery leaves evenly at the initial stage of the disease. Spray 1 to 2 times with an interval of 7 to 10 days. The safety interval for spring wheat is 40 days, and the safety interval for winter wheat is 30 days. It can be used up to 2 times per crop.
【Synthesis method】
1. React 4-tert-butylphenylisobutyraldehyde with pyridine in toluene, then treat it with formic acid, and remove water to obtain the final product.
2. It is prepared by reacting N-(2-methyl-3-phenyl)propylpiridine and isobutylene in dichloromethane under acidic conditions.
【Analysis method】
Use GLC with FID, and the residue is determined with GLC or HPLC with AFID.
【Main References】
1. Zhao Huiyu et al. Detection of fenpropidin residues in bananas and grapes by dispersive solid phase extraction-liquid chromatography-tandem mass spectrometry [J]. Journal of Pesticides, 2012, 14 (6): 664-668.
2. Yang Lu et al. Sensitivity of wheat powdery mildew fungal populations to triadimefon and fenpropidine in major wheat areas in my country in 2011 [J]. Acta Phytopathologica Sinica, 2013, 43(4): 430-434.
3. Ren Xiaodong et al. Introduction and characteristics of newly registered pesticide varieties in my country in 2013 [J]. Pesticides, 2014, 53 (3): 226.